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    <title>Document</title>
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<body>
    <script>
        // 对象字面量
        var obj = {}

        // 构造函数声明
        var obj2 = new Object()

        console.log(obj, obj2)


        var obj = {
            name: "张三",
            age: 18,
            sayName: function () {
                console.log(obj.name)
            }
        }
    </script>
</body>

</html>